138 BPM in Milliseconds: Delay Times and Note Lengths
At 138 BPM one beat (a quarter note) lasts 434.783 ms and one bar of 4/4 lasts 1.739 seconds. Below are the delay times for every note value, the same notes in Hz, bar and phrase lengths, samples per beat and the genres that typically sit at this tempo.
138 BPM at a glance
- One beat at 138 BPM lasts about 434.78 ms (60,000 divided by 138), an eighth note about 217.39 ms and a dotted eighth about 326.09 ms.
- A beat here is not a whole number of milliseconds. The nearest tempo where it is: 150 BPM, with 400 ms per beat.
- A beat is 19,173.913 samples at 44.1 kHz and 20,869.565 samples at 48 kHz, neither a whole number, so sample accurate loop points round slightly at both rates.
- A 4 bar phrase in 4/4 takes about 6.957 seconds, and 3 minutes of music at this tempo holds 103.5 bars of 4/4.
- Going from 138 to 139 BPM shortens each beat by 3.128 ms, about 0.72% of the beat.
- An LFO synced to quarter notes runs at 2.3 Hz; synced to whole bars of 4/4 it runs at 0.575 Hz.
Delay times at 138 BPM
Milliseconds for each note value. Dotted notes are 1.5 times as long, triplets 2/3 as long. Rounded to 2 decimals.
| Note | Straight | Dotted | Triplet |
|---|---|---|---|
| Whole note (1/1) | 1,739.13 ms | 2,608.7 ms | 1,159.42 ms |
| Half note (1/2) | 869.57 ms | 1,304.35 ms | 579.71 ms |
| Quarter note (1/4) | 434.78 ms | 652.17 ms | 289.86 ms |
| Eighth note (1/8) | 217.39 ms | 326.09 ms | 144.93 ms |
| Sixteenth note (1/16) | 108.7 ms | 163.04 ms | 72.46 ms |
| 1/32 note | 54.35 ms | 81.52 ms | 36.23 ms |
| 1/64 note | 27.17 ms | 40.76 ms | 18.12 ms |
138 BPM in Hz for LFOs
The rate that repeats once per note, for an LFO, tremolo or auto pan synced to 138 BPM. Rounded to 3 decimals.
| Note | Straight | Dotted | Triplet |
|---|---|---|---|
| Whole note (1/1) | 0.575 Hz | 0.383 Hz | 0.863 Hz |
| Half note (1/2) | 1.15 Hz | 0.767 Hz | 1.725 Hz |
| Quarter note (1/4) | 2.3 Hz | 1.533 Hz | 3.45 Hz |
| Eighth note (1/8) | 4.6 Hz | 3.067 Hz | 6.9 Hz |
| Sixteenth note (1/16) | 9.2 Hz | 6.133 Hz | 13.8 Hz |
| 1/32 note | 18.4 Hz | 12.267 Hz | 27.6 Hz |
| 1/64 note | 36.8 Hz | 24.533 Hz | 55.2 Hz |
Bar lengths at 138 BPM
| 1 bar of 4/4 | 1.739 s |
| 2 bars of 4/4 | 3.478 s |
| 4 bars of 4/4 | 6.957 s |
| 8 bars of 4/4 | 13.913 s |
| 16 bars of 4/4 | 27.826 s |
| 32 bars of 4/4 | 55.652 s |
| 1 bar of 3/4 | 1.304 s |
| 1 bar of 6/8 | 1.304 s |
| 1 bar of 7/8 | 1.522 s |
| 1 bar of 5/4 | 2.174 s |
Samples per beat at 138 BPM
| Rate | Per beat | Per 4/4 bar |
|---|---|---|
| 44.1 kHz | 19,173.913 | 76,695.652 |
| 48 kHz | 20,869.565 | 83,478.261 |
| 96 kHz | 41,739.13 | 166,956.522 |
Sample rate times 60, divided by 138.
What music is 138 BPM?
Dance tempo (120 to 139 BPM). This is the core dance music range. Steady four to the floor club music clusters here, and DJs often mix within a few BPM of it, so tracks at this tempo are easy to blend with each other.
Typical tempo ranges that include 138 BPM: Rock, Techno, Trance, UK garage, Trap (often felt at half time), Dubstep (felt at half time).
Half time: 69 BPM, in the typical range of Ballads, Reggae, R&B. Double time: 276 BPM, faster than the genre ranges listed here.
A track can be written at one tempo and felt at the other, so a song at 138 BPM may be counted as 69 or 276 in a DAW or DJ software. Ranges are typical only; plenty of songs sit outside them.
Work at 138 BPM
The BPM and Delay Time Calculator does this math for any tempo, including decimals, with tap tempo and milliseconds back to BPM. All free, in your browser.
Nearby tempos
Questions about 138 BPM
How many milliseconds is a beat at 138 BPM?
A quarter note beat at 138 BPM lasts about 434.78 ms, which is 60,000 divided by 138. An eighth note is about 217.39 ms and a sixteenth note is about 108.7 ms.
What delay time should I use at 138 BPM?
For a quarter note echo set about 434.78 ms, for a dotted eighth set about 326.09 ms and for an eighth note triplet set about 144.93 ms. If your delay has a tempo sync mode, picking the note value there gives the same timing.
How long is one bar at 138 BPM?
One bar of 4/4 at 138 BPM lasts about 1.739 seconds, so 8 bars take about 13.913 seconds and 16 bars take about 27.826 seconds. A bar of 3/4 lasts about 1.304 seconds.
Is 138 BPM fast or slow?
Dance tempo (120 to 139 BPM). Typical ranges that include 138 BPM: Rock, Techno, Trance, UK garage, Trap, Dubstep. Half time is 69 BPM and double time is 276 BPM.